... .quick delivery time4.sound after-sell service diamond and cbn grinding wheels used to grind high speed ... tool & die steels, alloy steels, Aerospace alloys and hard stainless steels We have the 1A1,12A2,6A2, ... 11A2,11B2,11C9,11EE9,11V9,12V2,14A1,14E1 and so on, special sizes can be customized When ... used for grinding high-speed steels, tool and die steels and super alloys with a hardness greater than HRC ...